Mohale Dam is a rock-fill dam in Lesotho. It is part of the Lesotho Highlands Water Project, which will eventually include 5 large dams in remote rural areas of Lesotho and South Africa.
The Lesotho Highlands, with its high rainfall and surface area of high basalt mountains - the Maloti - is an outstanding catchment area.
While Katse Dam is the highest concrete arch dam in Africa, Mohale Dam is the highest rockfill dam on the continent, consisting of 7.8 million cubic metres of rock that was placed and compacted before the addition of concrete face. The dam features a flexible outlet structure that ensures high quality water for downstream releases to ensure the sustainability of aquatic life.
The project is Africa's largest ever water transfer project as well as the largest ongoing bi-national construction project on the continent.